On July 31, 2018 President of the United States Donald Trump posted on Twitter about the decision to allow the online publication of the Liberator's files: “I am looking into 3-D Plastic Guns being sold to the public. Already spoke to NRA, doesn’t seem to make much sense!”.[9]

On the same day the tweet was posted, a federal judge stopped the release of blueprints to make the Liberator due to it being an untraceable and undetectable 3D-printed plastic gun, citing safety concerns.[10]

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The pistol is named after the FP-45 Liberator, a single-shot pistol that George Hyde designed and that the Inland Manufacturing Division of the General Motors Corporation mass-produced for the United States Office of Strategic Services (OSS) in World War II. The OSS intended to air drop the gun into occupied Europe for resistance forces to use.[11][12][13] A project of the OSS (which would later become the CIA), it is thought the Liberator was equally purposed as a tool of psychological warfare.[11] Occupying forces in Europe would have to weigh evidence of distributed pistols as a factor in planning against civilian resistance, which would complicate their strategy and affect morale. However, though used in France, there is little proof that the pistols were ever dropped into occupied Europe in large quantities.[11]

The physible Liberator's release to the Internet can be understood as Defense Distributed's attempt to more successfully execute the historical psychological operation, and as a symbolic act supporting resistance to world governments.[13][14]

Days after their publication, the United States Department of State's Office of Defense Trade Controls issued a letter to Defense Distributed demanding that it retract the Liberator plans from public availability.[15] The State Department justified this demand by asserting the right to regulate the flow of technical data related to arms, and its role in enforcing the Arms Export Control Act of 1976.

However, soon thereafter the design appeared on The Pirate Bay (TPB), which publicly stated its defense of the information. Quoted on TorrentFreak: "TPB has for close to 10 years been operating without taking down one single torrent due to pressure from the outside. And it will never start doing that."[6]

The site would go on to issue a statement on its Facebook page:

So apparently there are some 3D prints of guns in the physibles section at TPB. Prints that the US government now claim ownership of. Our position is, as always, to not delete any torrents as long as its contents are as stated in the torrents description. Printable guns [are] a very serious matter that will be up for debate for a long time from now. We don't condone gun violence. We believe that the world needs less guns, not more of them. We believe however that these prints will stay on the internets regardless of blocks and censorship, since that's how the internets works. If there's a lunatic out there who wants to print guns to kill people, he or she will do it. With or without TPB. Better to have these prints out in the open internets (TPB) and up for peer review (the comment threads), than semi hidden in the darker parts of the internet.

In May 2013, Finnish Yle TV2 current affairs programme Ajankohtainen kakkonen produced a Liberator handgun under the supervision of a licensed gunsmith and fired it under controlled conditions. During the experiment, the weapon shattered.[20][21]

Israeli Channel 10 reporters built and tested a Liberator with a 9 mm cartridge, successfully hitting a target at a distance of several meters. On June 24, 2013, the reporters smuggled the gun (without barrel and ammunition) into the Israeli house of parliament, coming within a short distance of Israeli PM Benjamin Netanyahu.[22]

A Japanese man built five copies of the Liberator, and on or about April 12, 2014, he uploaded video evidence of his possession of the weapons to the internet. Authorities arrested him on May 8, 2014, and found that at least two of the copies possessed lethal power.[23]Cody Wilson, a founder of Defense Distributed, stated on the incident that the man "performed his work in the open, without suspicion, fear or dishonor".[24]